/*
 * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.bpmn.converter.export;

import java.util.List;
import javax.xml.stream.XMLStreamWriter;
import org.activiti.bpmn.constants.BpmnXMLConstants;
import org.activiti.bpmn.model.BpmnModel;
import org.activiti.bpmn.model.FlowElement;
import org.activiti.bpmn.model.GraphicInfo;
import org.activiti.bpmn.model.MessageFlow;
import org.activiti.bpmn.model.SubProcess;
import org.apache.commons.lang3.StringUtils;

public class BPMNDIExport implements BpmnXMLConstants {

    public static void writeBPMNDI(BpmnModel model, XMLStreamWriter xtw) throws Exception {
        // BPMN DI information
        xtw.writeStartElement(BPMNDI_PREFIX, ELEMENT_DI_DIAGRAM, BPMNDI_NAMESPACE);

        String processId = null;
        if (!model.getPools().isEmpty()) {
            processId = "Collaboration";
        } else {
            processId = model.getMainProcess().getId();
        }

        xtw.writeAttribute(ATTRIBUTE_ID, "BPMNDiagram_" + processId);

        xtw.writeStartElement(BPMNDI_PREFIX, ELEMENT_DI_PLANE, BPMNDI_NAMESPACE);
        xtw.writeAttribute(ATTRIBUTE_DI_BPMNELEMENT, processId);
        xtw.writeAttribute(ATTRIBUTE_ID, "BPMNPlane_" + processId);

        for (String elementId : model.getLocationMap().keySet()) {
            if (
                model.getFlowElement(elementId) != null ||
                model.getArtifact(elementId) != null ||
                model.getPool(elementId) != null ||
                model.getLane(elementId) != null
            ) {
                xtw.writeStartElement(BPMNDI_PREFIX, ELEMENT_DI_SHAPE, BPMNDI_NAMESPACE);
                xtw.writeAttribute(ATTRIBUTE_DI_BPMNELEMENT, elementId);
                xtw.writeAttribute(ATTRIBUTE_ID, "BPMNShape_" + elementId);

                GraphicInfo graphicInfo = model.getGraphicInfo(elementId);
                FlowElement flowElement = model.getFlowElement(elementId);
                if (flowElement instanceof SubProcess && graphicInfo.getExpanded() != null) {
                    xtw.writeAttribute(ATTRIBUTE_DI_IS_EXPANDED, String.valueOf(graphicInfo.getExpanded()));
                }

                xtw.writeStartElement(OMGDC_PREFIX, ELEMENT_DI_BOUNDS, OMGDC_NAMESPACE);
                xtw.writeAttribute(ATTRIBUTE_DI_HEIGHT, "" + graphicInfo.getHeight());
                xtw.writeAttribute(ATTRIBUTE_DI_WIDTH, "" + graphicInfo.getWidth());
                xtw.writeAttribute(ATTRIBUTE_DI_X, "" + graphicInfo.getX());
                xtw.writeAttribute(ATTRIBUTE_DI_Y, "" + graphicInfo.getY());
                xtw.writeEndElement();

                xtw.writeEndElement();
            }
        }

        for (String elementId : model.getFlowLocationMap().keySet()) {
            if (
                model.getFlowElement(elementId) != null ||
                model.getArtifact(elementId) != null ||
                model.getMessageFlow(elementId) != null
            ) {
                xtw.writeStartElement(BPMNDI_PREFIX, ELEMENT_DI_EDGE, BPMNDI_NAMESPACE);
                xtw.writeAttribute(ATTRIBUTE_DI_BPMNELEMENT, elementId);
                xtw.writeAttribute(ATTRIBUTE_ID, "BPMNEdge_" + elementId);

                List<GraphicInfo> graphicInfoList = model.getFlowLocationGraphicInfo(elementId);
                for (GraphicInfo graphicInfo : graphicInfoList) {
                    xtw.writeStartElement(OMGDI_PREFIX, ELEMENT_DI_WAYPOINT, OMGDI_NAMESPACE);
                    xtw.writeAttribute(ATTRIBUTE_DI_X, "" + graphicInfo.getX());
                    xtw.writeAttribute(ATTRIBUTE_DI_Y, "" + graphicInfo.getY());
                    xtw.writeEndElement();
                }

                GraphicInfo labelGraphicInfo = model.getLabelGraphicInfo(elementId);
                FlowElement flowElement = model.getFlowElement(elementId);
                MessageFlow messageFlow = null;
                if (flowElement == null) {
                    messageFlow = model.getMessageFlow(elementId);
                }

                boolean hasName = false;
                if (flowElement != null && StringUtils.isNotEmpty(flowElement.getName())) {
                    hasName = true;
                } else if (messageFlow != null && StringUtils.isNotEmpty(messageFlow.getName())) {
                    hasName = true;
                }

                if (labelGraphicInfo != null && hasName) {
                    xtw.writeStartElement(BPMNDI_PREFIX, ELEMENT_DI_LABEL, BPMNDI_NAMESPACE);
                    xtw.writeStartElement(OMGDC_PREFIX, ELEMENT_DI_BOUNDS, OMGDC_NAMESPACE);
                    xtw.writeAttribute(ATTRIBUTE_DI_HEIGHT, "" + labelGraphicInfo.getHeight());
                    xtw.writeAttribute(ATTRIBUTE_DI_WIDTH, "" + labelGraphicInfo.getWidth());
                    xtw.writeAttribute(ATTRIBUTE_DI_X, "" + labelGraphicInfo.getX());
                    xtw.writeAttribute(ATTRIBUTE_DI_Y, "" + labelGraphicInfo.getY());
                    xtw.writeEndElement();
                    xtw.writeEndElement();
                }

                xtw.writeEndElement();
            }
        }

        // end BPMN DI elements
        xtw.writeEndElement();
        xtw.writeEndElement();
    }
}
